diff --git a/internal/extensionserver/post_translate_modify.go b/internal/extensionserver/post_translate_modify.go
index 8faa99622a..26b3637112 100644
--- a/internal/extensionserver/post_translate_modify.go
+++ b/internal/extensionserver/post_translate_modify.go
@@ -797,6 +797,7 @@ outer:
 var afterExtProcFilterPrefixes = []string{
 	egv1a1.EnvoyFilterExtProc.String(),
 	egv1a1.EnvoyFilterWasm.String(),
+	egv1a1.EnvoyFilterLua.String(),
 	egv1a1.EnvoyFilterRBAC.String(),
 	egv1a1.EnvoyFilterLocalRateLimit.String(),
 	egv1a1.EnvoyFilterRateLimit.String(),
diff --git a/internal/extensionserver/post_translate_modify_test.go b/internal/extensionserver/post_translate_modify_test.go
index 28c6a2951a..00ea2c718d 100644
--- a/internal/extensionserver/post_translate_modify_test.go
+++ b/internal/extensionserver/post_translate_modify_test.go
@@ -76,6 +76,16 @@ func TestInsertAIGatewayExtProcFilter(t *testing.T) {
 			expectedPosition:    1,
 			expectedFilterCount: 4,
 		},
+		{
+			name: "insert before lua filter",
+			existingFilters: []*httpconnectionmanagerv3.HttpFilter{
+				{Name: "envoy.filters.http.fault"},
+				{Name: "envoy.filters.http.lua"},
+				{Name: "envoy.filters.http.router"},
+			},
+			expectedPosition:    1,
+			expectedFilterCount: 4,
+		},
 		{
 			name: "insert before rbac filter",
 			existingFilters: []*httpconnectionmanagerv3.HttpFilter{